Medicine: Parachutists' Sensations

Last week two of the testiest physiologists in the U.S. talked back to the Army's Captain Harry Armstrong, long considered No. 1 U.S. authority on aviation medicine. At the University of Chicago's 50th anniversary celebration, famed Professors Anton Julius ("Ajax") Carlson and Andrew Conway Ivy marched in with a parachute jumper. In a learned paper on "The Physiology of a Free Flight Through the Air" they contradicted some of the scientific observations which Dr. Armstrong made when he jumped from a plane at 2,200 feet, six years ago.

Dr. Armstrong (who made the first...

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